Window-shade stop.



oHN G. MAcGUNE, or MINNEAPOLIS, MINNESOTA.

WINDOW-SHADE STOP.

Specification of Letters Patent. Patented June 13, 1916.

Application filed October 18, 1915. Serial N 0. 56,350.

To all whom it may concern:

Be it known that I, JOHN G. MAcCUNE,

a citizen of the United States, resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements .in VVindoW-Shade Stops, of which the following is a specification.

The object of my invention is to provide a stop for a window shade which will positively prevent the shade from being unwound too far, or torn away at the point where it is attached to the stick. Y

A further object is to provide a stop which can be adjusted for different lengths of shades and limit both the winding and unwinding, or the up and down movement of the shade.

A further object is to provide a stop device composed of but few parts and of very simple, economical construction.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification, Figure 1 is an inside view of the upper portion of a window showing a shade with my invention applied thereto, Fig. 2 is a detail sectional view', showing the stopdevice mounted in the end of the shade stick, Fig. 3.is a simi lar, View, showing another position of the stop, Fig. 4 is an end view of the shade stick and shade, wlth the shade roller up. Fig. 5 is a similar View, showing the stlck Wlth.

.the shade unwound, Fig. 6 is a sectional view of the opposite end of the stick from that shown in Fig. 4, Fig. 7 is a view of the stick at the opposite end from the one shown in Fig. 5, Fig. 8 is a detail View in section of one end of the stop device, Fig. 9 is a side view of the stop device removed from the stick.

In the drawing, 2 represents a Window casing, 3 a shade" stick and 4 a shade wound thereon. At each end of the shade stick are the brackets 5 having slots 6 wherein the ends of the shade stick are supported. At one end of the stick is a flattened pin 7 mounted in the casing 8 of the spring device usually employed in window shade attachments, and dogs 9 are arranged to enter notches 10 for locking the shade in different positions, all as found in the ordinary window shade fitting and to which I make no 7 and be held thereby against revolution, the. frame turning freely with the stick on the the screw in place while frame to turn freely thereon. This nut is provided with a shoulder l9'forming a stop claim in this application. 1 Atthe other end Vided with points 15 for insertion into the wood around the entrance to the recess 11. This frame revolves with the curtain stick.

.A screw 16 has hearings in the parts 13 and 14 and is provided with a flattened outer end slip into the slot '6 in the bracket 5 1 At the outer end of thescrew is a nut. 18

interiorly threaded to fitthe threads of the V screw and contact with the partvl4to hold permitting the for limiting the up movement or therwinding of the shade. A nut 20 ismounted on the screw and has a fiat under face 21 to engage the part 12 and beheld thereby against revolution, the nut slipping'along on the part 12 following the threads ofthescrew as the frame and stick, are revolved. This nut, has shoulders '22 and 23 thereon formed preferably by dividing the nut transversely on its upper side and pressing the end portlons so formed in opposite directions until they slide past one another about halftthe thickness, preferably, of the nut. Thus a shoulder will be formed on each side. A nut 24 is also mounted on the screw and provided with a shoulder 25 and held in any desired position on the screw by means of a lock nut 26, the shoulder 25 bein in position to engage the shoulder 22 and 'limit the movement of the nut 21 toward the inner end of the screw, and the down movement or unwinding of the shade. By loosening the lock nut 26, the length of travel of the nut 21 on the screw can be increased or decreased by adjustment of the nut 24. The shoulders formed on the nuts are in planes parallel substantially with the axis of the screw on which the nuts are mounted and consequently, when the shoulder of one nut contacts with the corresponding shoulder on the other nut, there will be no tendency of the nuts to wedge or jam together and pre vent freedom of movement of the curtain in either direction.

The inner surface of the bar 12 is'preferably graduafai, as indicated in Figs. 2 and 3, to enable the person hanging the curtain to properly adjust thestops for the desired movement of the shade either up or down.

This device is extremely simple in construction and though positive and reliable,

is dnfpos d of but few parts and hence is s tick, of a frame mounted in one end of said -stick to revolve therewith, a screw having bearings in said frame and projecting at one end' fbeyo nd said stickto form a support therefor and having means "for holding it r 7 against revolution,a sationary nut mounted 30I'1;S&1(1'SCI8W at one end thereof and seated 7 and a lock nut for normally holding said said'stationary and movable nuts being split transverselyi and having their opposing ends "offsettofform "shoulders in planes parallel against said frame, an adjustable nut mounted'on the opposite end of said" screw adjustable fnut against premature move- "nient, a movable nut mounted on said screw between saidstationary and adjustable nuts 'fandirevolving"Withsaid frame and stick,

with theaxis of'saidscrew,'the shoulders of said movable 'n'ut contacting with those of said stationary and adjustable-nuts for limitiiigtherevolution'of said frame and stick,

and said adjustable 'nutincreasing or de- 'creasingithe'travel .ofysaidmovable nut to adapt 'the-device' to curtains of different length. w 7 a 7 "21 A window 'shade stop comprising a threaded member mounted in one end of a 'shade stick and on which member said stick revolves, stops mounted on said member, one of them being normally stationary and the other adjustable toward and from the stationary stop, a nut mounted on said member for movement lengthwise thereof between said stops, said stops and said nut having shoulders formed thereon in planes running lengthwise of said member, whereby wedging ofsaid nuts and stopsagainst one another through the revolution of said stick is prevented.

3 A window shade stop comprising a threaded member adapted to fit into a socket in the end of a shade stick, stops mounted on said member, a nut mounted to travel on said member between said stops, said nut and stops having contacting faces in planes running lengthwise of said threaded member for checking the movement of said nut without wedging therewith, for the purpose specified.

able stop nut, a traveling nut on said member between said stop nuts and mounted to revolve with said stick, said stop nuts and said traveling nut having shoulders formed thereon provided with faces in planes parallel substantially with the axis of said threaded member, whereby wedging of the contacting faces with one another is prevented. I In witness whereof, I have hereunto set my hand this 14th day of October, 1915.

JOHN G. MAGCUNE.

"Gopiefqt t hirpatent may be 'obtai nerl for five cents each, by addressing the Commissioner of Patents Washington, D. 0.

. I 4. The combination, with a window shade 

